162156331 has 2 divisors, whose sum is σ = 162156332. Its totient is φ = 162156330.

The previous prime is 162156329. The next prime is 162156341. The reversal of 162156331 is 133651261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 162156331 - 2¹ = 162156329 is a prime.

It is a super-2 number, since 2×162156331² = 52589351366763122, which contains 22 as substring.

Together with 162156329, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 162156331.

It is not a weakly prime, because it can be changed into another prime (162156341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81078165 + 81078166.

It is an arithmetic number, because the mean of its divisors is an integer number (81078166).

Almost surely, 2^162156331 is an apocalyptic number.

162156331 is a deficient number, since it is larger than the sum of its proper divisors (1).

162156331 is an equidigital number, since it uses as much as digits as its factorization.

162156331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 162156331 is about 12734.0618421618. The cubic root of 162156331 is about 545.3114747331.

The spelling of 162156331 in words is "one hundred sixty-two million, one hundred fifty-six thousand, three hundred thirty-one".